[3][4][5] Wang (왕; 王), or king, was a Chinese royal style used in many states rising from the dissolution of Gojoseon, Buyeo, Goguryeo, Baekje, Silla and Balhae, Goryeo.
Moreover, there were Jwabo, Ubo and Gyeongbo (京輔) during the Han Dynasty whose job it was to administer and defend the capital.
The Daebo was a symbolic position but both the Jwabo and Ubo were similar to Prime Ministers who took part in politics and national defense.
We can also find people who were given positions like Dongbu (東部) and Bukbu (北部) that were written in front of their name in historical materials.
They were placed in the surrounding of the capital to defend it from the North and East, battling with the Nangnang (樂浪) and Malgal (靺鞨).
When King Goi of Baekje made political reforms in 260 the positions of Jwabo and Ubo were replaced by the new ministers called jwa'pyeong, and after handing over their roles disappeared.
The king proclaimed that the first six ranks should don purple outerware, and hang silver flowers from their crown.